Squid 3.5.x < 3.5.18 Multiple Vulnerabilities
Medium Nessus Network Monitor Plugin ID 9776
Synopsis
The remote proxy server is affected by multiple attack vectors.
Description
Versions of Squid 3.5.x prior to 3.5.18 are affected by multiple vulnerabilities :
- A flaw is triggered as input is not properly validated when handling HTTP request messages. This may allow a remote attacker to conduct a cache poisoning attack.
- A flaw is triggered as input is not properly sanitized when handling specially crafted host headers. This may allow a remote attacker to bypass same-origin protection mechanisms and cause the program to contact the wrong origin server. This may also poison downstream caches.
- Flaws in pointer handling and reference counting are triggered when handling specially crafted ESI response syntax. This may allow a remote server to cause a denial of service for Squid clients.
Solution
Either upgrade to Squid version 3.5.18 or later, or apply the vendor-supplied patch.